<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-alert show-icon title="注意：只允许为第三级分类设置相关参数！" type="warning" :closable="false">
            </el-alert>
            <div class="ma">
                <span>选择商品分类:</span>
                <el-cascader v-model="valueKeys" :options="cateList" :props="cateParamsProps" @change="handleChange">
                </el-cascader>
            </div>
            <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <el-tab-pane label="动态参数" name="many">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled"
                        @click="addParamsDialogVisible = true">添加参数
                    </el-button>
                    <el-table :data="manyTableData" border stripe>
                        <el-table-column type="expand">
                            <template slot-scope="scope">

                                <el-tag v-for="(element, i) in scope.row.attr_vals" :key="i" closable
                                    @close="handleClose(i, scope.row)">
                                    {{ element }}
                                </el-tag>
                                <el-input class="input-new-tag" v-if="scope.row.inputVisible"
                                    v-model="scope.row.inputValue" ref="saveTagInput" size="small"
                                    @keyup.enter.native="handleInputConfirm(scope.row)"
                                    @blur="handleInputConfirm(scope.row)">
                                </el-input>
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+
                                    New Tag
                                </el-button>

                            </template>
                        </el-table-column>
                        <el-table-column type="index" label="#"></el-table-column>
                        <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button size="mini" type="primary" icon="el-icon-edit"
                                    @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                                <el-button size="mini" type="danger" icon="el-icon-delete"
                                    @click="removeEditDialog(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
                <el-tab-pane label="静态属性" name="only">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled"
                        @click="addParamsDialogVisible = true">添加属性</el-button>
                    <el-table :data="onlyTableData" border stripe>
                        <el-table-column type="expand">
                            <template slot-scope="scope">

                                <el-tag v-for="(element, i) in scope.row.attr_vals" :key="i" closable
                                    @close="handleClose(i, scope.row)">
                                    {{ element }}
                                </el-tag>
                                <el-input class="input-new-tag" v-if="scope.row.inputVisible"
                                    v-model="scope.row.inputValue" ref="saveTagInput" size="small"
                                    @keyup.enter.native="handleInputConfirm(scope.row)"
                                    @blur="handleInputConfirm(scope.row)">
                                </el-input>
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+
                                    New Tag
                                </el-button>

                            </template>
                        </el-table-column>
                        <el-table-column type="index" label="#"></el-table-column>
                        <el-table-column label="名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button size="mini" type="primary" icon="el-icon-edit"
                                    @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                                <el-button size="mini" type="danger" icon="el-icon-delete"
                                    @click="removeEditDialog(scope.row.attr_id)">删除</el-button>


                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
            </el-tabs>
        </el-card>
        <el-dialog :title="'添加' + titleText" :visible.sync="addParamsDialogVisible" width="30%"
            @close="addParamsDialogClosed">
            <el-form :model="addParamsForm" :rules="addParamsFormRules" ref="addParamsFormRulesRef" label-width="100px">
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="addParamsForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addParamsDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addParams">确 定</el-button>
            </span>
        </el-dialog>
        <el-dialog :title="'修改' + titleText" :visible.sync="editParamsDialogVisible" width="30%"
            @close="editParamsDialogClosed">
            <el-form :model="editParamsForm" :rules="editParamsFormRules" ref="editParamsFormRulesRef"
                label-width="100px">
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="editParamsForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editParamsDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
import axios from 'axios'
export default {
    name: 'Params',
    data() {
        return {
            cateList: [],
            valueKeys: [],
            cateParamsProps: {
                value: 'cat_id',
                label: 'cat_name',
                children: 'children',
                expandTrigger: 'hover'
            },
            activeName: 'many',
            manyTableData: [],
            onlyTableData: [],
            addParamsDialogVisible: false,
            addParamsForm: {},
            addParamsFormRules: {
                attr_name: [{ required: true, message: '请输入参数名称', trigger: 'blur' }]
            },
            editParamsDialogVisible: false,
            editParamsForm: {},
            editParamsFormRules: {
                attr_name: [{ required: true, message: '请输入参数名称', trigger: 'blur' }]
            },
        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        async getCateList() {
            const { data: res } = await axios.get('categories')
            if (res.meta.status !== 200) {
                return this.$message.error('获取商品分类失败');
            }

            this.cateList = res.data




        },
        handleChange() {
            this.getParamsData()
        },
        handleTabClick() {

            this.getParamsData()
        },
        async getParamsData() {
            if (this.valueKeys.length !== 3) {
                this.valueKeys = []
                this.manyTableData = []
                this.onlyTableData = []
                return
            }
            const { data: res } = await axios.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
            if (res.meta.status !== 200) {
                return this.$message.error('获取参数列表失败')
            }
            res.data.forEach(element => {
                element.attr_vals = element.attr_vals ? element.attr_vals.split(' ') : []
                console.log(res.data)
                element.inputVisible = false
                element.inputValue = ''
            });
            if (this.activeName === 'many') {
                this.manyTableData = res.data
            } else {
                this.onlyTableData = res.data
            }
        },
        addParamsDialogClosed() {
            this.$refs.addParamsFormRulesRef.resetFields()
        },
        addParams() {
            this.$refs.addParamsFormRulesRef.validate(async valid => {
                if (!valid) return
                const { data: res } = await axios.post(`categories/${this.cateId}/attributes`, { attr_name: this.addParamsForm.attr_name, attr_sel: this.activeName })
                if (res.meta.status !== 201) {
                    return this.$message.error('添加参数失败')
                }
                this.$message.success('添加参数成功')
                this.addParamsDialogVisible = false
                this.getParamsData()
            })

        },
        async showEditDialog(id) {
            const { data: res } = await axios.get(`categories/${this.cateId}/attributes/` + id, { attr_sel: this.activeName })
            if (res.meta.status !== 200) {
                return this.$message.error('获取参数失败')
            }
            this.editParamsForm = res.data
            this.editParamsDialogVisible = true
        },
        editParamsDialogClosed() {
            this.$refs.editParamsFormRulesRef.resetFields()
        },
        editParams() {
            this.$refs.editParamsFormRulesRef.validate(async valid => {
                if (!valid) return
                const { data: res } = await axios.put(`categories/${this.cateId}/attributes/${this.editParamsForm.attr_id}`, { attr_name: this.editParamsForm.attr_name, attr_sel: this.activeName })
                if (res.meta.status !== 200) {
                    return this.$message.error('修改参数失败')
                }
                this.$message.success('修改参数成功')
                this.editParamsDialogVisible = false
                this.getParamsData()
            })
        },
        async removeEditDialog(id) {
            const result = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if (result !== 'confirm') {
                return this.$message.info('已取消删除')
            }
            const { data: res } = await axios.delete(`categories/${this.cateId}/attributes/${id}`)
            if (res.meta.status !== 200) {
                return this.$message.error('删除参数失败')
            }
            this.$message.success('删除参数成功')
            this.getParamsData()
        },
        
        handleInputConfirm(row) {
            if (row.inputValue.trim().length === 0) {
                row.inputValue = ''
                row.inputVisible = false
                return
            }
            row.attr_vals.push(row.inputValue.trim())
            row.inputValue = ''
            row.inputVisible = false
            this.saveAttrVals(row)
        },
        async saveAttrVals(row){
            const { data: res } = await axios.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
                attr_name: row.attr_name,
                attr_sel: row.attr_sel,
                attr_vals: row.attr_vals.join(' ')
            })
            if (res.meta.status !== 200) {
                return this.$message.error('修改参数相失败')
            }
            this.$message.success('修改参数项成功')
        },
        showInput(row) {
            row.inputVisible = true
            this.$nextTick(_ => {
                this.$refs.saveTagInput.$refs.input.focus();
            });
        },
        handleClose(i, row) {
            row.attr_vals.splice(i, 1)
            this.saveAttrVals(row)
        },
    },
    
    computed: {
        isBtnDisabled() {
            if (this.valueKeys.length !== 3) {
                return true
            }
            return false
        },
        cateId() {
            if (this.valueKeys.length === 3) {
                return this.valueKeys[2]
            }
            return null
        },
        titleText() {
            if (this.activeName === 'many') {
                return '动态参数'
            }
            return '静态属性'
        }
    }
}
</script>

<style lang="less" scoped>
.ma {
    margin-top: 15px;
}

.el-tag {
    margin: 0 10px;
}

.input-new-tag {
    width: 150px;
}
</style>